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Diffstat (limited to 'xpcom/string/nsTextFormatter.h')
| -rw-r--r-- | xpcom/string/nsTextFormatter.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/xpcom/string/nsTextFormatter.h b/xpcom/string/nsTextFormatter.h new file mode 100644 index 0000000000..f571043da2 --- /dev/null +++ b/xpcom/string/nsTextFormatter.h @@ -0,0 +1,172 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * This code was copied from xpcom/ds/nsTextFormatter r1.3 + * Memory model and Frozen linkage changes only. + * -- Prasad <prasad@medhas.org> + */ + +#ifndef nsTextFormatter_h___ +#define nsTextFormatter_h___ + +/* + ** API for PR printf like routines. Supports the following formats + ** %d - decimal + ** %u - unsigned decimal + ** %x - unsigned hex + ** %X - unsigned uppercase hex + ** %o - unsigned octal + ** %hd, %hu, %hx, %hX, %ho - 16-bit versions of above + ** %ld, %lu, %lx, %lX, %lo - 32-bit versions of above + ** %lld, %llu, %llx, %llX, %llo - 64 bit versions of above + ** %s - utf8 string + ** %S - char16_t string + ** %c - character + ** %p - pointer (deals with machine dependent pointer size) + ** %f - float + ** %g - float + */ +#include <stdio.h> +#include <stdarg.h> +#include "nscore.h" +#include "nsString.h" +#include "mozilla/Span.h" + +#ifdef XPCOM_GLUE +# error \ + "nsTextFormatter is not available in the standalone glue due to NSPR dependencies." +#endif + +class nsTextFormatter { + public: + /* + * sprintf into a fixed size buffer. Guarantees that the buffer is null + * terminated. Returns the length of the written output, NOT including the + * null terminator, or (uint32_t)-1 if an error occurs. + */ + template <typename... T> + static uint32_t snprintf(char16_t* aOut, uint32_t aOutLen, + const char16_t* aFmt, T... aArgs) { + BoxedValue values[] = {BoxedValue(aArgs)...}; + return vsnprintf(aOut, aOutLen, aFmt, + mozilla::Span(values, sizeof...(aArgs))); + } + + /* + * sprintf into an existing nsAString, overwriting any contents it already + * has. Infallible. + */ + template <typename... T> + static void ssprintf(nsAString& aOut, const char16_t* aFmt, T... aArgs) { + BoxedValue values[] = {BoxedValue(aArgs)...}; + vssprintf(aOut, aFmt, mozilla::Span(values, sizeof...(aArgs))); + } + + private: + enum ArgumentKind { + INT, + UINT, + POINTER, + DOUBLE, + STRING, + STRING16, + INTPOINTER, + }; + + union ValueUnion { + int64_t mInt; + uint64_t mUInt; + void const* mPtr; + double mDouble; + char const* mString; + char16_t const* mString16; + int* mIntPtr; + }; + + struct BoxedValue { + ArgumentKind mKind; + ValueUnion mValue; + + explicit BoxedValue(int aArg) : mKind(INT) { mValue.mInt = aArg; } + + explicit BoxedValue(unsigned int aArg) : mKind(UINT) { + mValue.mUInt = aArg; + } + + explicit BoxedValue(long aArg) : mKind(INT) { mValue.mInt = aArg; } + + explicit BoxedValue(unsigned long aArg) : mKind(UINT) { + mValue.mUInt = aArg; + } + + explicit BoxedValue(long long aArg) : mKind(INT) { mValue.mInt = aArg; } + + explicit BoxedValue(unsigned long long aArg) : mKind(UINT) { + mValue.mUInt = aArg; + } + + explicit BoxedValue(const void* aArg) : mKind(POINTER) { + mValue.mPtr = aArg; + } + + explicit BoxedValue(double aArg) : mKind(DOUBLE) { mValue.mDouble = aArg; } + + explicit BoxedValue(const char* aArg) : mKind(STRING) { + mValue.mString = aArg; + } + + explicit BoxedValue(const char16_t* aArg) : mKind(STRING16) { + mValue.mString16 = aArg; + } + +#if defined(MOZ_USE_CHAR16_WRAPPER) + explicit BoxedValue(const char16ptr_t aArg) : mKind(STRING16) { + mValue.mString16 = aArg; + } + +#endif + + explicit BoxedValue(int* aArg) : mKind(INTPOINTER) { + mValue.mIntPtr = aArg; + } + + bool IntCompatible() const { return mKind == INT || mKind == UINT; } + + bool PointerCompatible() const { + return mKind == POINTER || mKind == STRING || mKind == STRING16 || + mKind == INTPOINTER; + } + }; + + struct SprintfStateStr; + + static int fill2(SprintfStateStr* aState, const char16_t* aSrc, int aSrcLen, + int aWidth, int aFlags); + static int fill_n(SprintfStateStr* aState, const char16_t* aSrc, int aSrcLen, + int aWidth, int aPrec, int aFlags); + static int cvt_ll(SprintfStateStr* aState, uint64_t aNum, int aWidth, + int aPrec, int aRadix, int aFlags, const char16_t* aHexStr); + static int cvt_f(SprintfStateStr* aState, double aDouble, int aWidth, + int aPrec, const char16_t aType, int aFlags); + static int cvt_S(SprintfStateStr* aState, const char16_t* aStr, int aWidth, + int aPrec, int aFlags); + static int cvt_s(SprintfStateStr* aState, const char* aStr, int aWidth, + int aPrec, int aFlags); + static int dosprintf(SprintfStateStr* aState, const char16_t* aFmt, + mozilla::Span<BoxedValue> aValues); + static int StringStuff(SprintfStateStr* aState, const char16_t* aStr, + uint32_t aLen); + static int LimitStuff(SprintfStateStr* aState, const char16_t* aStr, + uint32_t aLen); + static uint32_t vsnprintf(char16_t* aOut, uint32_t aOutLen, + const char16_t* aFmt, + mozilla::Span<BoxedValue> aValues); + static void vssprintf(nsAString& aOut, const char16_t* aFmt, + mozilla::Span<BoxedValue> aValues); +}; + +#endif /* nsTextFormatter_h___ */ |